Do you have any problems currently with the games you play? If no, then don't upgrade.
They are running at about 60fps on high 1920x1080 resolution but does that really determine the effect next gen games will have on my pc ? I cant play games that haven't released yet, I'm just wondering if I will have to set all my graphical settings to low or even lower my resolution when games like watch dogs or maybe even GTA V release. I prefer to have my games at high/ultra with around 50-60 fps with 1920x1080 resolution so if I have to resort to lowering my settings for performance I'd just rather spend some money to upgrade.